In the cases of CF and your dad, you are singling out negative outcomes, summarily dismissing the thousands of positive outcomes that occur regularly. What if the union representing the steel workers acted like the Teamsters representing YRC? I am making an assumption here, but if the union recognized the difficulty that the steel company was having financially, maybe some give backs could have saved your fathers job and pension.
Again, you are taking the false equivalency path with respect to contracts. The vast majority of contracts are favorable to labor. They include benefits the companies would have NEVER conceded to unrepresented employees. AND...they are contracts, meaning the company is under legal obligation to abide by the terms. What legal obligation does XPO have to adhere to now? NONE!
That they may not like you and want to get rid of you is remotely possible, but highly unlikely.
Companies provide financials when entering negotiations. A company struggling with profitability may threaten to close their doors unless the union concedes certain give backs. A union may do this to preserve the jobs of their membership in anticipation of the company righting the ship and making the next contract more favorable to their members. I'm guessing this is what happened with YRC. What's wrong with this? It may rub employees the wrong way, but the alternative would have been far worse.
A profitable company uses the "going out of business" scam as a deterrent to fair negotiations. Failure to bargain in good faith is an unfair labor practice and with financials in hand the union will file the charge and it will be upheld by the NLRB. The company may still refuse and make a last/best offer which the union should refuse and bring the negotiations to an impasse. That's when the strike becomes the most useful tool in the toolbox.