I think your point is just emphasizing how bad these native datepickers are. They are specifically used by the browsers for <input type="date">. Their purpose is to enter a date. That's why their use in this way is absolutely standard (far more so than the term "calendar picker" as far as I'm aware. The user's not choosing a calendar, they're choosing a date). That doesn't mean the choice of input method can't be improved, but highlighting it as a pet peeve won't make it happen at scale. What do you suggest instead?

The answer shouldn't be "create something custom for entering dates that don't happen to be in the current year", it should be "fix the datepicker so it's fit for purpose".