The problem is Ubuntu, but that consumers have migrated from desktops/laptops to Phones. (Bad for Linux, and bad for society as it's much easier to be a non-passitive participant on a desktop/laptop.)
for most people app selection on ubuntu is big enough to never need anything more
only professional/rare software sometimes has no support/suitable alternative
For you and me maybe. But don't expect other people to have your standard of software choices etc.