You cant expect from a guy, who is born and raised in Canada not the same dedication like LTU born guys. It simply tells this.
Domas Sabonis is born in Portland and lived in USA, Spain. He's the first modern Lithuanian emigrant to play for NT. But his attitude is great. So it depends on individual.
Iggy would be very big hit cause when 24yo declines NT you have a problem, it's a bad example. No player ever declined NT if he's available and not restricted by circumstances (like Sabonis skipping 2017 EB because Pacers asked him to do so) from U24 I think. When young players skipping NT it's problem. I'm OK with vets taking off here and there, but not U27 guys. Jasikevicius took off when he was 29-30yo. Then came back. If say Grigonis wants to fully heal the back and come back to Olympics it's all good. I understand Iggy is tired, he really had very busy year, but so did Jokubaitis and he's 100% in.
With Iggy the problem is that culturally he's more of American. He has that side of loving LTU NT, but culturally and character wise he;s Canadian/American. I would even say Buzelis and specially Indrusaitis are more Lithuanians in terms of their character and attitude, specially Indrusaitis who speaks Lithuanian really well as Chicago born and often coming back to Lithuania. While Brazdeikis wasn't in Lithuania for 8 years before coming to play for NT I think. Iggy is different, his dad was MMA fighter, he has mentality which is not common for Lithuanian. It's good and bad. Good because he doesn't care on the court and goes ISO and is good at it. bad - he doesn't relate with LTU culture all that much. But generally I wouldn't overestimate all this situation. Most likely Iggy will show up and if he's not, he already showed dedication to the NT so we'll see him in next tournaments. He let go his chances to play for Canada because of the idea to represent Lithuania. I respect that, and he gave all his heart to Lithuania last year, both NT and Zalgiris.
Long term I think Iggy will be fine. He loves to compete. He came to NT without any contracts and represented it when such folks as D-Mo many time skipped NT because of lack of insurance and so on.
I'm more concerned about Buzelis. He's doing it because of family alone I feel

He want to greet his parents and family this way, but has probably nearly zero connection. From Lith players he only knows JV and watches some Domas, that's it

He probably never watched LTU NT seriously as he was too small back then and when he became sensational teen basketball prospect he was too busy and probably didn't have luxury to get NT games watching with his dad. Brazdeikis for example was watching NT games and know all these Kleizas, Kalnietises as his idols growing up.
While Indusaitis I feel is another case. He is very much Lithuanian in terms of character, more introverted, not too emotional, all about business in the court and he seems naturally very Lithuanian connected community, often visits Lithuania, speaks Lithuanian pretty well, came to play and played well for U16 without any hesitation. I think will be dedicated.
Iggy, Buzelis, Indusaitis. That's our best emigrants. Iggy will 90% dedicated, Buzelis will be 60-80% dedicated, Indruaaitis 100%. If that will be the case, it's all very good if you ask me.
It's all about individuals. Timinskas skipped NT because he had furniture to shift, Salenga run from NT for no reason, Jurkunas showed indifference to NT and so on. Every individual case is different.
Jokubaitis says he prioritize NT instead of NBA. A. Mariciulionis once said that winning Olympic medal with NT for him would mean more than winning NBA title. That's when you know NT gonna be alright. When your floor generals have that attitude, it's gonna be OK. I can't imagine Rubstavicius being pretentious. He's like terminator in terms of BB - silent and calm off court, but all business on the court.
Yes, new tendency is that players are more cautious and more career conscious. But for us it's important to have super loyal core as say it was JV, Kuzminskas, Sabonis and I can see such guys as Jokubaitis, Marciulionis, Rubstavicius, Murauskas, Tubelis being dedicated all the time. And the good news we gonna have deeper talent pull this decade. So when there will be absences it will be easier to substitute it.
https://www.youtube.com/watch?v=WOhnrcbnHas&ab_channel=BasketNews․LT