Why would any Landlord fail to prohibit the use of subwoofers?

[Harlowe Thrombey]

Subwoofers (audio speakers dedicated to a powerful bass reverberation) are an inherent menace to anyone near a person using one.  They reverberate through walls at long distances (up to 2/3 of a mile at full power.... in a typical car installation of one).   Of course we all have terms in the lease that prohibit general disruptive behavior.  But why not pre-empt the use of subwoofers right from the start?  Why not zero tolerance?  The type of person to use a subwoofer is not the type of person you would want in your unit, even if rent is always on time.  How could anyone disagree with that?
So tell me:  Why do 99% of leases fail to prohibit subwoofers?

[Joe Splitrock]

@Harlowe Thrombey that is just covered as part of a noise disturbance clause in most leases. It may make sense to add a specific clause if you have repeat issues, but it would be impossible to add every possible thing to your lease.