Risk doesn't really change the function.
Its area denial tool working in the same way as bofors, except for no additional cost, without negative modifiers, without popcap cost and with much greater health poll.
It is NOT an are denial tool. It's first and foremost, a tech building that can defend itself. You can use it offensively, but it is much more expensive, comes way later, has no barrage, has no brace, and losing it can lose the game more often than not. Only thing it has, is more HP, than a Bofors. The functions are fundamentally different for those two structures.
Terrible example.
There isn't a single sane player in the game saying okw flak is fine.
I know no one says it is fine, but THIS is THE equivalent to the Bofors. Bofors should be compared to this and nothing else.
That is exactly a playstyle/BO choice.
It got its hardcounters just like any other BO.
And the emplacement can hardcounter many of its "counters" with barrage and comes much faster than anything that can reliably take it down. Sim city is a BO/playstyle. Bofors is just cancer.