I tend to deal with both aspects the best I can. A good conditioner should only help, but I can’t say as though it’ll make up for the short comings of a cheap wall wart.
My conditioner is a Lightspeed CSL3200. I’ve never done any comparisons, and I haven’t removed it since installing it about 6 years ago, but I have upgraded the wall warts for my modded Bugle 3 phono stage, and my modded SMSL DAC, and both of those upgrades were notable, then I plug those into the conditioner.
A lot of lower cost components use those cheap wall wart unregulated switching power supplies, but it’s fairly easy to replace them with a linear regulated version with the same specs (many generic versions are under $50), and should always be a step in the right direction....whether you can actually hear it or not, it’s less likely to fail and cause a problem to the component. If you're the type that tries to leave no stone unturned, and you're looking for easy potential upgrades that don't break the bank, I'd recommend it.