Bubbles are not a bad thing.
When the bubble bursts, the rest is truly useful.
Many economies have really ushered in their golden period after a bubble.
the argument has never been about whether bubbles are good or bad. although your statement is absolutely right. the argument has always been about some idiots who keep on insisting that bitcoin is a bubble no matter what.
for example there has been a lot of chatter about how bitcoin is a bubble when price went to $1000+ in 2017. practically the same people who are calling bitcoin a bubble were calling it a bubble back then too. and even if price fell down to $1 today they would still call it a bubble!