It’s like using a low-bandwidth hdmi cable on a 4K tv. People may not notice that their device isn’t charging well but as long as it’s charging they may not complain. Doesn’t mean the situation is anywhere close to ideal.
Life is better when you stop caring about having something ideal. Because nothing ever has been or ever will be ideal. As soon as we achieve today's ideals, the goal posts will have been moved to something else we can only just not get.
I get this with a “cheap” USB c cable from Action. On good days it will train in at 60W charge. More often just at 30W. No problem for my 13” M1 laptop you never notice unless trying to rapid charge or looking at stats. But I did notice it with my old intel mbp it couldn’t stay charged.
