Jesus, God in the flesh, was approachable. Sinners sought Him out. Mothers brought their children to Him to be blessed. He was angered at the very idea they should be kept from contact with Him. Spirituality and Approachability are linked, I think.
I used to hate it when well meaning people at conferences used to stop people approaching me after I had spoken, or when I was hived off to some secret room. I know it was to protect me, it was well meant, but…
Anyway, don’t over protect your space. Take time apart for sure, as did Jesus, your health and well-being matter, but remember that approachability and hospitality – making time for others in your time and space for others in your space – is part of being like Jesus. Spirituality is proved in how we are with “what” or “who” we perhaps are too quick to dismiss as interruptions, distractions to the really important matters of our life in the Spirit or our terribly vital calling.
After learning from my mistakes over the decades, I would say that boundaries are good in life and ministry as a full time parish minister in the traditional sense. But remember, if you are involved in full time ministry of some sort, barriers need to be there for two positive purposes: for your wellbeing, and to enable healthy and sustainable availability to others. They should not be put in place with the purpose and intention of putting a series of hurdles in the road of people coming to you.
I have known people in ministry who make boundary setting a bit of a professional obsession. When that happens “Keep away, I am far too busy with more important matters than you!” becomes the main unspoken message of your ministry that people will speak plenty about for sure, much more than the sermon you spend hours praying over and diligently preparing. The pendulum does so often swing too far in one direction or another.