No, actually I love it. I like reading blog posts and even more now that I can collect them all in a little Mastodon list. Mastodon also has an active photographic community, so I don’t see why you wouldn’t want to see Pixelfed content.
Also, yes, specialised services work well for their own type of content. But it is vital that there is always an alternative and that you’re never stuck in a walled garden.