This is based on my personal experience with gaff and tucking.
Depending on style of clothing you choose, tucking will definitely help to present a smooth finish.
I do have one gaff, and I’ve also tried taping and just straight tucking. I stopped doing any gaffs/tucking a long time ago, biggest reason is when nature calls, it can be very tricky to retuck everything back in again. Plus, if you are like me and getting on in age, when nature calls it doesn’t just ring the doorbell once, it is like a fire alarm. If I tucked with tape, I would have a mess on my hands immediately as there would be no way I’d free everything in time.
BTW, the gaff I bought is now just collecting dust.
I don’t wear leggings or very tight clothing, so for me tucking is not necessary. A nice panty that has some control plus some shapewear with an opening for the bathroom has been a successful combination for me. I opted for comfort and ease of bathroom over aesthetics.