The reason Athlete Type (Focus Duration) ranges from Road Sprinter (2 min power) to Sprint TT (20 min power) is you need some higher power stimulus to train effectively.
If 1-3 hour power were an option you’d be telling the system to train by riding endurance level exclusively where your power curve starts to flatline. That works to raise TP over time especially with unrestricted hours to train, but is not an efficient or effective way to train long term.
You want to address your low and high/peak systems in proportion applicable to your goals which you should vary from time to time.
What type of events or goals do you have in mind?
What are your program settings and target end date?
There are a number of posts here that discuss cadence drills. Xert doesn’t push them but you can practice cadence drills on appropriate workouts if you like. The coach community is split on their true value. Otherwise your preferred natural cadence is the way to go. That likely rises for those new to cycling who may start in 60-70rpm range and find themselves 90+ a few years later. You may also be a grinder versus spinner.
You may find my onboarding tips post of interest although some content is outdated –
Onboarding steps for Xert trial users and newbies - General - Xert Community Forum