Yes its not compulsory.
Using Bitcoin should never be compelled upon anyone.

But if you want to verify you are serious about using and supporting the growth of LN then showing a horse and gun does that.

I don't have a problem if someone cant be bothered doing so, but if that someone then spouts grandiose narratives about how Bitcoin is so important, but have not bothered to attach wallets, then I might quite justifiably call them out as a blatant hypocrit.

@DarthCoin for example.