Odd Systemd error

[orangemn6]

Expected behavior
For lightdm to run when I run it

Actual behavior
Lightdm doesnt run, and systemctl status lightdm says

● lightdm.service - Light Display Manager
     Loaded: loaded (/lib/systemd/system/lightdm.service; static; vendor preset: enabled)
     Active: failed (Result: exit-code) since Fri 2020-12-18 22:31:43 EST; 1min 15s ago
       Docs: man:lightdm(1)
    Process: 19759 ExecStartPre=/bin/sh -c [ "$(basename $(cat /etc/X11/default-display-manager 2>/dev/null))" = "lightdm" ] (code=exited, status=0/SUCCESS)
    Process: 19762 ExecStart=/usr/sbin/lightdm (code=exited, status=1/FAILURE)
   Main PID: 19762 (code=exited, status=1/FAILURE)

Dec 18 22:31:43 prometheus systemd[1]: lightdm.service: Scheduled restart job, restart counter is at 2.
Dec 18 22:31:43 prometheus systemd[1]: Stopped Light Display Manager.
Dec 18 22:31:43 prometheus systemd[1]: lightdm.service: Start request repeated too quickly.
Dec 18 22:31:43 prometheus systemd[1]: lightdm.service: Failed with result 'exit-code'.
Dec 18 22:31:43 prometheus systemd[1]: Failed to start Light Display Manager.

Steps To Reproduce

1. open a terminal
2. run sudo systemctl start lightdm
3. doesnt work
   Screenshots
   If applicable, add screenshots to help explain your problem.

Additional context
I can run it from test mode, but not from systemd