1. For people like you that don't want to install them, they're just a normal website.
2. For people that do want to install them for the added functionality (things like notifications), then it is easy to install, and furthermore cheaper for developers to build and maintain (one codebase instead of multiple).
You say "you have no desire to have an app", but I think for most people that's really dependent on the site/application. Yeah, for any site I just have a short term or infrequent transaction, I don't want an app either. But many/most people use apps for businesses they have long term relationships with (namely financial institutions).
That's not always because of anything intrinsic to the Web. We know that ordering a pizza isn't any more complicated than what can be represented on a paper form. Forms can also be capably represented in a browser. The problem is that app developers are by and large not capable of distilling the requirements down to what is necessary and sufficient for the task at hand. Instead, they're foolishly preoccupied with what they consider to be the mandate to deliver experiences.
1. For people like you that don't want to install them, they're just a normal website.
2. For people that do want to install them for the added functionality (things like notifications), then it is easy to install, and furthermore cheaper for developers to build and maintain (one codebase instead of multiple).
You say "you have no desire to have an app", but I think for most people that's really dependent on the site/application. Yeah, for any site I just have a short term or infrequent transaction, I don't want an app either. But many/most people use apps for businesses they have long term relationships with (namely financial institutions).