It is not necessarily better to wear an underwire bra, it is simply a preference. Underwire bras provide support and separation, but some women find them painful to wear.
Wire-free bras can also provide a similar level of support, but they often rely on full coverage to get the same amount of lift, making them less versatile under clothing.
Both can be excellent options depending on your goals.
Shop Honeylove Bras
CrossOver Bra Wireless Bra
Honeylove's criss-cross mesh adds a signature touch, and a bonded underbust lifts without underwire. A wide wing with back-smoothing fabric eliminates back bulges. Adjustable straps and back let you modify your fit, and the straps can also be crisscrossed to stay hidden under racerback tank tops.
3D printed velvet adds support, and a bonded underbust lifts without underwire. Adjustable straps and back closure let you modify your fit. Straps can also be crisscrossed to stay hidden under racerback tank tops.