Probably true. If you're dead set on getting beginner monitors for well under $300 for a pair, look at ones like Mackie CR3, M-Audio AV32, PreSonus Eris. They do the trick for a lot of people, and hey if you absolutely hate them then you'll know you need to save up at least $300 for your next pair. This goes beyond what you're asking but I can't recommend enough reading over a
studio monitor buying guide (
this one is helpful too) and understanding why - or why not - you would opt for certain things like speaker sizes, sub or no sub, passive vs active etc. For actually
good monitors around that $300 price point, people rave about the JBL LSR305s. They're legit.
I wasn't all that impressed with the JBL's actually. I read all the rave reviews too... I just didn't feel it.
Now that's my real point: I don't think I'm smarter than all the people that love them, or have better ears. But it's an argument to never buy speakers until you've seen and heard them..
preferably in a few different situations with different sources. Especially at lower price ranges, the perfect speaker doesn't exist.. not even one that comes close, so it's really about what works best for your room, your ears and eventually your mixes. If a speaker hypes the sound in areas where you tend to overdo things, that's not a bad thing. You can have a speaker that translates amazingly well, but if it sounds horrible while you're working on it, you're never gonna love what you're doing with it. I'd say liking how it sounds is a big factor too, but others may not give a damn about that.
So the best idea: save up even more budget while you go to a lot of stores where you can see and hear different speakers. Talk to people that use them, or if you can go to friends' studios and check their speakers, hear their experiences.. hear your music on them. Play some other music which you consider mixed perfectly and play some music which has obvious flaws. Then eventually you'll find something that stands out to you, at a budget you're comfortable with. The 3000 dollar speaker is always gonna beat the 300 dollar one.. but once you get to that price range, you also have to consider room treatment, etc.. and consider whether those things represent a worthy investment for you. If it's just hobby you might want to buy new nikes and bikes for the kids first

You'll also find more and better deals, so maybe you can snatch up a 600 dollar speaker for 300.
Worst idea: oh shit.. I have some money in my pocket, lets get some speakers based on what other people say about them. You don't know what their stake is.. people will defend their purchasing decisions to the hilt, they're not just defending the product itself. They're defending their personal decision as to why they bought this model and not a similar one, but also why they didn't go for a cheaper or more expensive option. The cheaper will always be trash for them, the more expensive one always 'not worth it'. It's just psychology. Some people will just outright be marketing shills too.