lately i see a lot of players hit my single piece on the 7th position (close to their home) leaving a single piece of their own there

they even do this at the start of the game

isnt this too dangerous ? as its quite easy to hit it back (7 with 2 dice, or a single die for a piece still in their home) and they will lose a lot more than i lost when i hit them back ?

or is their some secret reason for this ? :)