You can, but as scan_interval and consider_home are global settings then I would have to muck around with, and potentially break, the accuracy of my other device trackers (Google Maps, Bluetooth and BT Smart Hub scanners for presence detection)
EDIT: have tried to migrate everything to NMAP but struggling to get something passable. Ideally I want the sensors to update within 10 seconds so the template switches are responsive - but NMAP can’t seem to deal with a fast scan interval. With ping, I can set it to scan once a minute, but update the entity quickly after HA sends commands to turn the switch on or off. Just a shame it won’t work consistently!