I don't really care about Right to Repair, either, but the the criticism of the Apple battery situation in this post is
explicitly about a private company bribing legislators into making a decision that benefits no one other than Apple itself and said legislators, and in the post it's quoting, none of your criticism of his criticism applies, because it was way before Apple had any
time to collect evidence that making batteries harder to replace helped the consumer in any way.
While I don't mind the battery situation outside of the legislative issue, I do disagree on your claim that they're "better" in some way (but again, irrelevant to the original criticism).
Here's an anecdote to elaborate on why, since you asked:
I've had a few iPhones, varying degrees of battery quality, fairly well taken care of. I've also had a few other phones of various manufacturers and operating systems, mostly with replaceable batteries.
The ones with replaceable batteries had equivalent-to-better battery life than the iPhones I've had, including before replacing the battery, and especially after the battery on the iPhones had worn down a bit. Without iOS's battery management that throttles performance to save battery life, I've had iPhones that at 87% of max capacity (I just checked the one I'm currently using; it was probably higher when I tested this a few weeks ago) that can't outlast an HTC phone from eleven years ago that I've replaced the battery on a single time, when doing comparable tasks, and that's not even getting into the modern devices I have that beat both of them by a decent margin. This includes both with the screen on and the screen off.
Apple's battery life comes from software band-aids, not some magical benefit of soldering on batteries. Soldering just serves to make the device thinner, which is of dubious benefit.