Yes and No
Yes because some upper leaves are blocking light to the lower bud site so this is a lack of light repartition that can be corrected with a defoliation but we are not talking about stripping them down ,: justr removing a leaf or 2.
No Because if you can apply a simple LST to help with the light repartition then no need to cut anything , just to move them but in you case it's looks like the tent is full and your space to bend the stems is limited