True, but the moral of the story is don't build a half-assed park (or two) and then have to spend so much fixing them that there's no budget leftover to maintain your existing parks. Currently Universal's two (or three) existing parks are in decent shape from continued investment, so as long as they commit to the full build-out of EU, things should be OK. Now if they cut things (like Disney did with DAK) or build a half day park (like Disney did with DHS) then the existing parks will suffer. I really don't see that happening.
Also, Universal is much smarter when it comes to budgeting projects than Disney. Disney spent more to clone Little Mermaid for Magic Kingdom than Universal spent on the original Wizarding World (Hogsmeade Village, and the attractions).