I played devils advocate on this one about ten years ago; & no-one could give me a 'genuine' reason for fitting one in the UK...... still cant!
IF a bull-bar is rigid enough to take an impact and not bend itself, then its going to pass those forces to whatever its bolted to.
If its bolted to the bumper mounts, well, IF it's bolted securely enough then wot will bend, instead of your bonnet, will be your chassis.......
If its NOT bolted that secure....... well it will just fold into the bonnet and spread the damage!
In the outback, where your life could depend on being able to limp a vehicle back to civilisation, and a banana'd chassis is less of a risk to that than a smashed radiator, possibly a different story.... but here in the UK?
About he only 'use' is to have some-where to hang your strop.
But, then depending on type, makes cleaning the lamps or changing a bulb, or getting the pressure washer in to get the mud out the rad more of a hassle.
Added weight also dont help fuel consumption much, and wind around them increases noise.
As for recovery, steering guard with recovery eyes £80, or a pair of Jates £15. Bridle between them, on shackles, 'slip' shackle on the bridle, and cable or rope off that, and wrap the end round the wing mirror......
And take it OFF when you leave the P&P, and stick it in a bin-liner in the boot.