What are some reasons people argue against right to repair?
user
Some reasons people argue against the right to repair is:
1: Repairing could lead to user injury which could bring consequences to both the user and the companies who produce the technology. 
2: Self repairing could lead to lower efficiency since the users wouldn't know as much about how to repair it as the companies themselves. 
3: It could lead to the release of trade secrets and manufacturing which could help rivals and competition.
assistant
How would one argue against these concerns? I find it quite stupid that we do not have such a right yet.
user
For the first point, you could argue that using the right to repair could absolve the company from any injury incurred.

For the second point, you could argue that a functioning, but less efficient device is better than a device that doesn't function at all.

For the third point, you could argue that this point is moot because you can already open any device and reverse-engineer it. Not having a right to repair does not prevent that.
assistant