How to use the jinja2 output as an ansible directive instead of a chain of characters?

Question

I am currently displaying some vars with 'extract':

- name: Display hostvars over conditionnal
  hosts: all

  tasks:   
        - debug: 
            msg: "{{
              ansible_play_hosts
              | map('extract', hostvars, inventory_hostname)
              |selectattr('ansible_distribution', 'regex', 'Rocky|CentOS' )
              |selectattr('ansible_distribution_major_version', '==', '8' )
              |flatten
            }}"

The result is a list of name that match to those conditions:

TASK [debug] 
ok: [ancolie-lba] => {
    "msg": [
        "vm703-dev"
    ]
}

and now I'd like to template this display with jinja2 ansible_facts.j2

{{'{{'}}
ansible_play_hosts
|map('extract', hostvars)
{% for condition in conditions %}
|selectattr('{{condition.attribute}}', '{{condition.verb}}', '{{condition.text}}' )
{% endfor %}
|flatten
{{'}}'}}

so as to use the jinja2 output file like follow:

        - block:
            - name: generate a conf
              template: 
                src: ansible_facts.j2
                dest: /tmp/ansible_facts
            - debug:
                msg: "{{lookup('file', '/tmp/ansible_facts')}}"
          tags: template
          delegate_to: localhost
          vars:
            conditions:
              - attribute: 'ansible_distribution'
                verb: 'regex'
                text: 'Rocky|CentOS'
              - attribute: 'ansible_distribution_major_version'
                verb: '=='
                text: '8'

But it seems that ansible interprets the lookup output as a chain character instead of excuting the filters as initially:

What is returned:

    "msg": "{{ansible_play_hosts|map('extract', hostvars, os)|selectattr('ansible_distribution', 'regex', 'Rocky|CentOS' )|selectattr('ansible_distribution_major_version', '==', '8' )|flatten}}"

Expected result:

TASK [debug] *********************************************************************************************************************************************************************************
ok: [ancolie-lba] => {
    "msg": [
        "vm703-dev"
    ]
}

How to use the jinja2 output as an ansible directive instead of a chain of characters?