"The problem is a barring was not properly greased and failed so what about these irrelevant things which had nothing to do with the accident?". Tell me why this is not the moaning of an intellectually crippled retard? How did this effect the accident?
It wasn't just the bearing.
The train that derailed was still using an antiquated braking system that hasn't changed much since trains were invented. When activated suddenly the cars don't all brake at the same time... the car at the front brakes first and then each car down the line starts braking in turn. That's what causes these horrendous derailments.
There is already available an electronic braking system that minimizes the jackknifing/pile-up effect by braking all cars at the same time. The railroad's lobbyists (government and regulatory bribes) succeeded in blocking a regulation that would have required updating to the new system.
Biden, his administration, and the democrats also successfully blocked (at the request of railroad companies) a rail strike that wasn't only about sick days... it was also about working conditions and staffing.
Then the decision to do a "controlled release" (i.e. RELEASE) by allowing the cars' contents to burn off- that as well was suggested by the railroad company, not OSHA or the EPA or any other environmental regulator. The decision was made to maximize profit, not to minimize consequences.
That bearing, which may or may not have been detected with adequate staff and inspections, was only the catalyst. The root causes of the disaster are greed and corruption.
Same as it ever was.