While I agree that most of the stuff in data centers is probably crap, but that's because most of everything people do is crap. That's not for me to decide though, people save things because they find value in them. Most of what has value to another person won't have value to you. Most of what people treasure in their life is thrown away after they die because nobody wants it, even their closest family members. Who gets to tell everyone the bad news, that objectively their memories are trash and they don't have a right to keep them anymore? Gerry Fuckin' McGovern?
Secondly, we aren't destroying the environment for any of this. Data centers use like 5% or less of the overall electricity use. It's a lot, but we don't have to put datacenters in random locations, we can (and do) put them where electricity is cheap. That generally means that the 5% of electricity used for data centers, kwh for kwh isn't as impactful as an average kwh of end use. Large companies like Meta and Google claim to have zero net carbon by obtaining offsets. So in general we aren't "destroying the environment" to store copies of photos.