No. You are simply incorrect in your assumptions that op return can create new use cases that dilute the established purpose of bitcoin. v30 is still the same bitcoin as v29. If op return alone could kill bitcoin it would have already.
Discussion
Nobody is claiming the change “alone could kill bitcoin” the concern is with opening it to future attacks and diluting its purpose as money.
Ps. Of topic: your site is broken. Use https://pagespeed.web.dev/
Mechanic literally said v30 would kill bitcoin several times in tweets and on his youtube channel. Nothing about op return dilutes bitcoins purpose as money, what are you smoking. Are you having transacting because I can transact just fine.