Your argument was not to get into a long term commitment because then you might have to wait a year to be able to use the best model again...not that you could get by using a rotating cast of free tier AI models...
The reason for not buying into a monthly subscription is not a reason thati should put shouldn't buy a year long one and is not negated in any way
As for why pay for access when you can get on free tiers? Well, because the pay models are far far better than the free ones. That's it.
Your idea wasn't valid, no need for all the nastiness