standardbearer Suoreme court judges are the most experienced judges and also for an appeal to be allowed there is usually more to be presented or there is a point of law that it is felt the high court couldn’t rule on or there was sufficient argument by the appellant that the court erred in relation to the law.
Edit: I also find it comforting in terms of judicial oversight that all 11 judges found the proroguing in this instance to be unlawful. If this was as controversial a decision as is being portrayed then I would have expected some dissent.
What we should be really concerned about is the Conservative government has consistently found itself at odds with the courts and railing against its decisions. By creating a narrative now where it says the courts need parliamentary oversight it could set in motion something far worse.
I would suggest it is the wish of the current government to be able to rig the judicial system in its favour should it get a big enough majority. It is using an emotive subject to do so.
I trust the courts far more than I do any government.