The voltage indicator on my Fluke 177 multimeter is just as unreliable, but it is still sold with it and is a useful addition.It is NOT fine
The pro-electrician will ( should ) be aware of those situations where a volt stick will give a false indication,
The DIYer may not be aware of those situations and assume that the indication is correct.
If the false indication shows "No Voltage" then the DIYer is at risk.
Blup