You don't need to bed a chassis at all. Torque down to specs and sequence.
I simply don't believe that is really completely true. The mating surface of a chassis isn't any different from the mating surface of a bedding block (or even a perfectly molded synthetic stock). Even if we assume that the precision of that mating surface might be absolutely totally perfect (which it probably isn't), I know for an absolute fact that the mating surface of the receiver isn't perfect at all and no two are the exactly the same.
Whenever two surfaces are screwed together where one or both surfaces are not perfect matches to each other, stresses are introduced. Those stresses are the bane of accuracy. The primary objective of a "PROPER BEDDING JOB" is to make the two surfaces a perfect match so that there are no stresses when the screws are tightened down.
I do believe that there will be situations where a perfect bedding block or a perfect chassis mated to a perfect receiver will result in a perfect fit, but this is not very common - probably less than one in a hundred.
I would invite you to solidly mount a dial indicator with thousandths graduations to the barrel of your rifle just beyond the end of the stock or chassis forend, and then position the indicator tip to make contact with the forend such that the indicator will show any relative movement between the two. Stand the rifle vertically on its butt plate, hold it by the stock only, and then alternately tighten and loosen each of the screws one at a time (one of the screws is always tight). Any movement in the indicator at all with either screw proves that there is stress in the bedding. Removing this stress by properly bedding the rifle is a good idea. The amount of movement is directly proportional to the quality of the bedding and the skill of the individual doing it. I try to achieve less than a half thousandth and will rebed the rifle as many times as necessary to achieve that.
Also, I know that there is the odd rifle that will shoot well even with stress, but that is the exception - not the rule.
Lastly, the accuracy of most rifles will improve with a proper stress free bedding job assuming the shooter and conditions are good enough to be able to take advantage of that improvement.
So, all that said, there is no question that properly bedding a rifle is not a job for the faint of heart. I've seen some bedding jobs that look worse than a gutt pile. For those who don't want to bed their rifle, a GOOD bedding block or a GOOD chassis is definitely the next best thing. I wouldn't say one is "inherently" better than the other though.