That is such a far fetched POV. There is a subwoofer myths link at the top of this forum, which debunks your post.
Ported subwoofers are more efficient, and all things equal, will produce more sound, at lower frequencies. Sealed subwoofers are smaller, and require more power. They have a shallower roll off compared to port subwoofers but this roll of starts higher up then your average ported subwoofer. They also have a more gradual slope on the roll off, which is often why they are perceived as being "tighter". This roll off can be mimicked on good ported subwoofers however, and still take advantage of the ported subwoofers efficiency.
Unless you have space constraints, a port subwoofer will give you more SPLs and lower extension compared to sealed subwoofers (all else equal).
SheepStar