I was more talking about like this one:
But for double-track junctions it’s a different story, i agree with you.
However, rather than it’s cheaper and simplier, it’s still less efficient than the one with the flyover:
https://en.wikipedia.org/wiki/Double_junction (look the E type)
Thus, in all my setups in TF i always do the flyover one – I hate when trains wait outside the station 😉