It's a valid standard of comparison whether you like it or not. Nobody says you MUST like high DPI screens, same as nobody forces you to need SoCs with high geekbench scores or devices with large amounts of NAND. Some people don't need a fast SoC or more than 16GB NAND and that's perfectly fine. So if you're eyesight isn't good enough, or your usage pattern doesn't take advantage of it, then greater detail isn't something you need and you should be happy because devices have pretty much met your needs on that front.
For the record, according to research, most people cannot see improvements over around 500 dpi, though some do notice greater detail up to 600 dpi or so. At such high dpi the gains in detail are realized only on close inspection so for many usage scenarios they don't matter.
But you know, it's all good, because in a few years Apple's flagship phone will boast an even higher DPI, and then all the fanbois will proclaim that anything less is unusable and OMG their photos are so amazing with 500dpi they can see things they never seen before!