For ticks specifically, not that I know of, but this is outside my realm of study. There is broadly evidence that parasites are beneficial, if not simply important to, ecosystem functioning: they can affect animal behavior, population control and dynamics, serve as prey, etc.

Here is a study hypothesizing benefits of parasites in broader ecosystem processes. For all that humanity does know, there is still an inordinate amount that it does not know, and we should not be so bold or naive to think that we can remove an entire group of organisms without cascading consequences.

You would hate the world that existed without yellow jackets or other wasps. The one without mosquitoes or ticks would be similarly changed for the worse. Like them or not, they're important to our ecosystems.

I'd argue the fact that organisms are heading toward extinction is worth caring about in itself, not just because some people can derive value from them.