To be fair, Zico is retired, and is currently a technical advisor to a Japanese club, so he’s not going to see anywhere near as much grass as Haaland by default.
That aside, it’s actually pretty easy to bring down tall players when they are on the move, regardless of how strong they are, by pulling them from behind (or tripping them up). I should know, as it happened to me all the time when I played (1.86m and 215 pounds in my prime at 21 just before my serious knee injury). Our centre of gravity is higher, and you can use or own weight against us. And the opposite is generally true of short players, regardless of their strength/weight. It’s one of the reasons why Rico, Phil, Bernie, El Mago, and Kinky, among others, are/were so hard to take down or trip compared to Rodri or Haaland whilst in full flow. It’s also why nearly all top level wrestlers (of the real variety, not the WWE) tend to be short and stalky (it’s not just because of weight classes).
It’s actually not surprising at all that Haaland is going to wind up on his arse more given it’s easier to take him down by pulling and tripping and referees generally allow opposition players to do it with very little in the way of punishment (so they do it even more, realising that).