He, Arrhenius and Fred Hoyle may yet have the laugh on us doubters. When the first bacteria colonized the earth, almost four billion years ago, it was by our standards a hostile place. There was no free oxygen to breathe and no ozone to block out the sun's damaging ultraviolet radiation. The air was hot and full of noxious chemicals such as sulphurous gases released by volcanoes. Not for nothing is it called the Hadean Eon.
Life manages very well without oxygen, evolving into flourishing communities of anaerobes.
And pressure is quite irrelevant, with bacteria growing happily in a near vacuum or at the huge hydrostatic pressure of deep ocean trenches. And even if they do get frozen, many bacteria revive when their habitat thaws. There are bacteria that metabolize iron, nitrogen, sulphur, and other inorganic materials. There are bacteria today that can live without sunlight. Some species of cyanobacteria are highly resistant to ultraviolet radiation.