You actually can!
If the government doesn't protect your wages, you are left at the mercy and greed of capital. I can guarantee you that means you will be thrown under the bus the first opportunity they see fit, as soon as it makes a financial sense.
Look at the avalanche of layoffs that started with Twitter. Now the market is flooded with engineers, which makes our individual bargaining position worse. Employers notice this, and decide to stagnate your wages, saying: "well, there are many unemployed people that will be glad to be hired, just be happy you still have a job".
All of this is happening in the background of them racking in record profits and awarding their c-suite tremendous bonuses. And you are supposed to be grateful for the scraps. Does that seem fair? The government is too slow and pressured by lobbyists to act, and you are on your own.
By the way, the current cost of living crisis and the insane levels of inflation were both caused by the corporations' greed and the government's inability (or incentives to turn a blind eye) to curb them.
The mega corps used every excuse under the sun to increase their prices AND to fire people: bad macroeconomic situations, the wars in Ukraine/Palestine, high price of energy, and in that way they drove inflation up and unemployment up (thereby reducing the cost of labor). But when it comes to your salary, they don't care, as if you yourself are not impacted by inflation or layoffs.
Luckily, with unions, together, we are strong, and can at least partially retaliate to corporate greed. If anything, it's the unions that can bring the economy back, by allowing a reasonable salary for their middle class members. Thereby they are keeping funds within the country and not allowing the funds to be diverted towards the 1%'s offshore accounts.
This is why, contrary to what you claimed, you can unionize to a fairer, better economy, and this is EXACTLY how it works.
Great for Fastmail employees!