I said that with regards to people going a bit OTT with "sign him Boberto, he plays for Belgium, they're top 5". He's got decent pace, fantastic dreadlocks, but leaves a lot to be desired in the actual defending part of the game, and his tackles when standing up are Bambi on ice. If we use the same yardstick then we should be looking at Dedrick Boyata, seeing as he plays for one of the top national teams and also a top 1 Scottish team? But we all know he's kinda poop really.
Belgian league isn't exactly fantastic though, is it? It's essentially Scotland outside of Scotland - Anderlecht win it nearly every year, and in the last few years there's been a bit more competition from Brugge and Gent (who won it for the first time in their 100+ year history) and occasionally Standard with their golden generation that they all sold when the players were 18-20 years old. So Scotland with 3 teams and fancier names then? Either way, not a fantastic league, and Lukaku jr doesn't really strike as a fantastic player for now. Maybe in the future he'll be as good at his position as his brother is, respectively, but now - no. Galloway is way more developed in everything except pace, where Belg lad beats him.