The Walther factory spec for the PPQ trigger pull being approx. 25 N (5.6 lbs) is within the currently popular "industry standard" for a LE duty pistol's trigger pull in the US. I see the current trigger travel is listed by Walther as .4", too.
Now, private handgun owners obviously ought to be aware of their own level of training and familiarity with handling any firearm they may choose to lawfully carry. Especially if they anticipate it may have to be used under stress.
It certainly makes sense that if someone thinks a trigger pull is too light for them, they would look for something with which they are more comfortable and confident using, and which they feel would be more suitable for meeting any skill and safety practice limitations they believe may be applicable to themselves.
Last time I looked, the state of MA didn't approve of a PPQ model, so there's probably no heavier trigger option available that was approved for MA compliance? They do, however, list the PPS, P99 AS/QA/990 and the discontinued SW99 series on their roster.
In my older Walther armorer manual the trigger pull for both the P99DAO/990 and the P99 QA is listed at 8.54lbs, which might be preferable for someone wishing a heavier trigger pull (although the P99 AS is listed at 9lbs DA & 4.5lbs SA).
Lots of selections being offered by the major makers nowadays, if someone wants to shop around (and depending what's available in their state).