[MZ3Carbon]

I recently bought a pedestal-like spoiler off AliExpress and I don't want to drill holes in my trunk for it.
I went to my local O'Reilly for some 3M tape and the cashier (who claims he was an ex-mechanic) said 3M is tape alone without bolting it down is not enough.
His reasoning is that down force will eventually loosen the 3M tape and the spoiler will fly off if that's the risk I'm willing to take.
I know 3M tape is enough for ducktail spoilers but I don't know about the one I bought.
The max speed I drive is around 90 MPH so does downforce really matter?
Is he correct about my spoiler needing to be bolted or is he just using scare tactics?

This is the type of spoiler I bought

 

[MZ3Carbon]

@arathol
Sorry, figured I started the thread in the wrong section so I started another one in discussion.

@MazdaGT_E
I'm lowkey scared of the holes rusting so I'm resorting drilling as last resort (also I've never drilled into my car before)
If I were to drill holes to install the wing, would it look something like this?

Also, the holes that the manufacture gave looks janky. Do you think the bolt will bite onto it?

 

[MZ3Carbon]

Ok, noted.
Is there a specific size of rivet nut that I should use?

Sorry if I'm asking stupid questions, I've never done this before 😓