You can do some good work with a lot of budget friendly tools. As the saying goes, it's a poor craftsman that blames the quality of his work on his tools. For example, I have a 20 year old loss-leader promotional table saw from Craftsman, but I can get good work out of it. Cabinetry quality stuff. I could make furniture. A dovetail jig, however, is one of those buy once cry once tools. It's worth getting a good one if you plan to use it. You will drive yourself absolutely toys in the attic trying to get a functional joint out of a cheap flimsy jig.
I'm on my way up to Lowe's to get the lumber for a ramp up to my front deck. It's primarily for my mobility scooter that I use part time, but I'm going to put in some holes up top to mount a winch so I can pull heavy things up without messing up my back. I get an indescribable sense of confidence and pride from being able to do all these things for myself.
I agree expensive tools are not the sole solution to fine carpentry and no substitute for talent and hard work. On the other hand, poor tools can handicap anyone. Saws that won’t maintain settings for square cuts, inadequate machinery to properly do a given job -
lack of a joiner, planer, etc.- and related items can both help and hinder the process for fine carpentry.
Having an expensive dove tail jig and a high dollar router will enable you to cut great dovetails - but then the same person will never learn to hand cut dove tails. Depends on what your goal is. Wanna say you built a fine piece of furniture without using one single power tool ? That’s great. Wanna show off a great project where you used all the latest gadgets. That’s fine too. To each his own.