That's true too. Strength to weight ratio is going to be a limiting factor in getting started on bw but you can still work up to it. It is limited strength gain but it's unlikely that most people are at the limit unless they're already pretty strong.
The endurance issue is more about how you train bw than intrinsic to bw itself. Most people train it at the high rep range but with relatively low strength req's so, yeah, at that point they're just boosting muscular endurance with limited strength gain.
But if they progress the bw exercises themselves, they can continue to gain strength...to a point. Put another way, no one should be doing 100 regular push ups as the end point of their bw training. They should eventually get to one arm push ups. Why? Because while you're still lifting the same bw, now you're asking just your chest and single arm to handle it. It's similar to going from benching 135 on a barbell to benching two 135 dumbbells. Obviously, if you can move the same weight with one hand you're much stronger. In weight work, no one would stop at a 135 bench but they frequently stop there with push up variations, instead of progressing to the more difficult variations and the strength requirements that come with them.
Handstand pushups are another example. If you can shoulder press your weight then you don't need handstand push ups. But not many average gym goers are doing that. But strength is strength, everyone should take the path that resonates most with them.